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Temperature- and time-dependent mechanical behavior of post-treated IN625 alloy processed by laser powder bed fusion

Alena Kreitcberg, Karine Inaekyan, Sylvain Turenne and Vladimir Brailovski

Article (2019)

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Abstract

The microstructure and mechanical properties of IN625 alloy processed by laser powder bed fusion (LPBF) and then subjected to stress relief annealing, high temperature solution treatment, and hot isostatic pressing were studied. Tensile testing to failure was carried out in the 25–871 °C temperature range. Creep testing was conducted at 760 °C under 0.5–0.9 yield stress conditions. The results of the present study provided valuable insights into the static and creep properties of LPBF IN625 alloy, as compared to a wrought annealed alloy of similar composition. It was shown that at temperatures below 538 °C, the mechanical resistance and elongation to failure of the LPBF alloy were similar to those of its wrought counterpart, whereas at higher temperatures, the elongation to failure of the LPBF alloy became significantly lower than that of the wrought alloy. The solution-treated LPBF alloy exhibited significantly improved creep properties at 760 °C as compared to the wrought annealed alloy, especially under intermediate and low levels of stress.

Uncontrolled Keywords

nickel-based superalloys; additive manufacturing; high temperature mechanical properties; creep resistance

Subjects: 2000 Materials science and technology > 2000 Materials science and technology
2000 Materials science and technology > 2001 Materials structure, properties and testing
2000 Materials science and technology > 2002 Materials processing/fabrication
2000 Materials science and technology > 2003 Metallurgy/metals/alloys
Department: Department of Mechanical Engineering
Funders: CRSNG/NSERC, Consortium de recherche et d'innovation en aérospatiale au Québec (CRIAQ), Pratt & Whitney Canada, Fusia, Thermetco, FZ Engineering
PolyPublie URL: https://publications.polymtl.ca/4978/
Journal Title: Journal of Manufacturing and Materials Processing (vol. 3, no. 3)
Publisher: MDPI
DOI: 10.3390/jmmp3030075
Official URL: https://doi.org/10.3390/jmmp3030075
Date Deposited: 13 Jul 2022 10:45
Last Modified: 11 May 2023 21:12
Cite in APA 7: Kreitcberg, A., Inaekyan, K., Turenne, S., & Brailovski, V. (2019). Temperature- and time-dependent mechanical behavior of post-treated IN625 alloy processed by laser powder bed fusion. Journal of Manufacturing and Materials Processing, 3(3), 75 (18 pages). https://doi.org/10.3390/jmmp3030075

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